Improvement in compositions for coating metal pipes, roofing



JOSEPH SPEGHT, OF MEMPHIS, TENNESSEE.

IMPROVEMENT IN COMPOS ITIONS FOR COATING METAL PIPES, ROOFING, 8m.

Specification forming part of Letters Patent No. 134,822, dated January14, 1573.

To all whom it may concern:

Be it known that I, JOSEPH Srncnr, of Memphis, in the county of Shelbyand State of Tennessee, have invented certain new and usefulImprovements in Composition or Gement for Coating Pipes, Roofing,Ooffins, 860., of which the following is a specification:

This invention relates to that class of compositions used to cover metalpipe for the prevention of oxidation, &c., and as a covering for theroofs of houses, walls, pavements, sidewalks, cars, and similarstructures and it consists in a tough, flexible,plastic mass formed bythe union of coal-tar, gum-pitch, and pinepitch, and unslaked lime withor without asphalt, say about in the proportions hereinafter specified.The object of this invention is the production of a' composition whichshall not be liable to run when exposed to the heat of the sun or tohigh temperature; sufficiently elastic or flexible to allow forexpansion or contraction in the article to which it is applied; notliable to be affected by the warping of unseasoned roofing-planks, &c.;and not of that brittle nature which would cause it to crack and peelunder pressure or concussion.

In making my compound I take the following ingredients in about theproportions specified: Goal-tar, one barrel; gum-pitch, onefourth of abarrel; pine-pitch, ten pounds; unslaked lime or its equivalent, fifteenpounds; asphalt, ten pounds. These articles are intimately mixed bymeans of heat, and care should be had to keep the temperature even atall times during the mixing process. The lowest heat that will enablethe operator to thoroughly mixthe mass is themost desirable and willprod uce the best results. When I desire to use this compound asaroofing-cement I omit the asphalt, but form the compound in all otherrespects in the manner above set forth. The asphalt is introduced intosuch compounds as are to be in contact with earthy matter, viz.,cofl'ins, lining of cisterns and like receptacles, and also when Idesire to coat metallic substances.

When formed the compound will resemble a thick paste or sirup, which, ifused in the summer, may be employed without subjecting to artificialheat, and may be spread, with a brush or other suitable means, upon theroof or other thing to be coated. After a short time the cement becomesleathery, or of a tough flexible nature, if exposed in layers to theaction of the atmosphere. As before stated, in warm weather, while inbulk it will retain such a consistency as to be readily spread; but incold weather it will require to be reheated before using.

Where it is desired to coat the inside of tubing a cord, wire, or rod,carrying a washer, is drawn through the pipe and the liquid poured in,which will follow the course of the washer, due to the vacuum created;while if the outside alone is to be coated, it can be best done by theuse of a brush, as in painting.

In forming roofing the cement may e used either with or without feltingor other fabric, when such are used; but upon metallic roofing thecompound will be applied directly upon the same.

Such a composition being water-proof or water-repellent, and not itselfacted upon by liquids of corrosive character, is admirably adapted forcoating metallic pipes or tubing inside to prevent the contamination ofliquids, and outside to prevent rusting or oxidation; and it is adaptedfor coating and lining cisterns, casks, coflins, and other receptaclesdesigned to protect or preserve their contents; and makes a good andsubstantial coating for the roofs or side walls of buildings, or forcoating sidewalks or pavements, where the object is to shed water orprevent dampness, thus preserving the same from the effects of theatmosphere and decay. The compound will also be admirably adapted forrepairing damaged or leaky roofs, 8m, the crevices or damaged portionsbeing covered or filled with some suitable material, and the same coatedwith the compound, in the manner aforementioned.

The cement, when compounded and applied substantially as above setforth, will not only be found to be water-repellent, but will also proveitself perfectly fire-proof.

As the ingredients forming the compound are free from all noxious ordeleterious substances, water collected upon the same and conveyed tosuch cisterns, 800., will be found to be pure, clear, and free from allodor.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. The compound of coal-tar, gum-pitch, pine-pitch, and unslaked lime,or their equiv. alent, in about the proportions and for the purposespecified.

2. The compound of coal-tar, gum-pitch,

pine-pitch, unslaked lime, or equivalents, combined with asphalt, inabout the proportions and for the purpose set forth.

In testimony that I claim the foregoing I have hereunto set my hand.

J OS. SPEGHT. Witnesses:

JAMES L. NORRIS, WM. J. PEYTON, STELLA SPEGHT.

